SCHEDULED MAINTENANCE
Tandem catalysis induced by hollow PdO: highly efficient H2 generation coupled with organic dye degradation via sodium formate reforming†
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Abstract
High-quality crystalline PdO nanoparticles with Kirkendall nanovoids uniformly supported on titanate nanotubes (kv-PdO/TiNTs) are shown to be robust catalysts toward low temperature formate reforming into COx-free H2 as well as sequential organic dye degradation under ambient conditions. The maximum H2 evolution reaction rate for kv-PdO/TiNTs catalysts is measured to be in the magnitude of 6.5 mol g−1 h−1 at room temperature (∼25 °C), and the corresponding initial turnover frequency (TOF) is as high as 2601.6 h−1. More importantly, for the first time we find that the H2 production system is highly efficient for subsequent organic dye degradation without the addition of external energy, such as light, electricity and heat, or the addition of any artificial oxidants, e.g., H2O2. It is speculated that the active oxygen-centered species generated in the dehydrogenation catalytic system and the pre-reduction process induced by free hydrogen radicals play important roles in organic dye treatment. Thus, a unique tandem catalytic system by coupling hydrogen production with organic dye degradation is presented.
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